US4378709A - Friction drive for positioning table - Google Patents
Friction drive for positioning table Download PDFInfo
- Publication number
- US4378709A US4378709A US06/195,238 US19523880A US4378709A US 4378709 A US4378709 A US 4378709A US 19523880 A US19523880 A US 19523880A US 4378709 A US4378709 A US 4378709A
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- US
- United States
- Prior art keywords
- axis
- friction drive
- drive bar
- shaft
- bar
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H19/00—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion
- F16H19/02—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary or oscillating motion and reciprocating motion
- F16H19/025—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary or oscillating motion and reciprocating motion comprising a friction shaft
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/18—Mechanical movements
- Y10T74/18568—Reciprocating or oscillating to or from alternating rotary
Definitions
- the present invention is related to drive means for positioning tables and, more particularly, to drive means for XYZ positioning tables wherein at least one table is constrained to travel to controllable positions along a longitudinal axis.
- a positioning apparatus comprising a frame, a table on the frame, the table being movable back and forth in a straight line, a friction drive bar centered along an axis of motion of the table, means for attaching the friction drive bar to the table, a servomotor fixed to the frame having a rotatable shaft, means for pinching a peripheral surface of the shaft into frictional contact with the friction drive bar, and the means for attaching being effective to permit lateral motion of the friction drive bar with respect to the table.
- FIG. 1 is a perspective schematic view partly broken away of a single axis positioning table according to the prior art
- FIG. 3 is a cross section taken along III--III of FIG. 2;
- FIG. 4 is a cross section taken along IV--IV of FIG. 2;
- FIG. 5 is a simplified presentation of FIG. 4 showing deflection of a friction drive bar to the right;
- FIG. 6 is a simplified presentation of FIG. 4 showing deflection of the friction drive bar to the left;
- FIG. 7 is a cross section of a servomotor shaft and drive head taken along VII--VII in FIG. 6.
- FIG. 1 Before describing the present invention in detail, a brief description of a conventional positioning table is given with reference to FIG. 1 to provide background for understanding the present invention.
- a U-shaped frame 18, preferably a monolithic rigid cast member, includes guide means such as V-shaped grooves 20 accurately machined in the inner surfaces of arms of U-shaped frame 18. Rollers or guides (not shown) in the edges of table 12 engage and roll or slide in V-shaped grooves 20.
- a longitudinal lead screw 22 is journalled at its outward end in a bearing block 24 and is supported and rotated at its inboard end by servomotor 16.
- Lead screw 22 is accurately centered under table 12 and is preferably precisely aligned parallel to V-shaped grooves 20.
- a traveling nut 26 is rigidly affixed to the bottom of table 12 and is engaged by threads on lead screw 22.
- lead screw 22 is preferably a ball screw and traveling nut 26 is preferably a preloaded traveling nut including means for recirculation (not shown) of ball bearings.
- the longitudinal position of table 12 is sensed by a conventional sensing means (not shown) and used in a conventional controller (not shown) to provide drive signals to servomotor 16.
- the apparatus of FIG. 1 may serve to control one axis of a two or three orthogonal axis system.
- the apparatus shown in FIG. 1 may provide motion along an X axis as represented in the three-axis coordinate system 28 illustrated in FIG. 1.
- the apparatus of FIG. 1 may be mounted upon a corresponding apparatus to provide motion along the Y axis.
- motion along the Y axis is accomplished by moving the entire apparatus of FIG. 1 and motion along the X axis is accomplished by moving table 12 with respect to frame 18.
- Z-axis motion can be accomplished in a similar manner.
- rotary motion about one or more of the axes in the three-axis coordinate system 28 or any other axes may be provided by conventional equipment not shown.
- Precise alignment of lead screw 22 with the X axis is critical to positioning accuracy. Slight misalignment of lead screw 22, machining tolerances in V-shaped grooves 20, eccentricities in the drive of servomotor 16 or concentricity errors in the motor bearing of servomotor 16 can all serve to add uncompensatable position errors.
- FIG. 2 there is shown a positioning table 30 containing a friction drive according to an embodiment of the present invention with the U-shaped frame of FIG. 1 omitted for clarity of presentation.
- a support bar 32 is affixed along the center underside of table 12 by any suitable means such as, for example, by screws 34 preferably countersunk to or below the surface of table 12.
- a friction drive bar 36 is supported spaced below support bar 32 on flexure members 38 and 40 along substantially the entire length of support bar 32 and friction drive bar 36.
- Flexure members 38 and 40 are preferably thin metallic strips bridging the gap between the sides of support bar 32 and the sides of friction drive bar 36. Flexure members 38 and 40 may be attached by an convenient means, such as, for example, by a plurality of screws 41.
- First and second back-up rollers 46 and 48 are supported on shafts 50 and 52 mounted on a hinged support bar 54.
- Hinged support bar 54 is pivoted on a pivot such as, for example, a shoulder bolt 56 which is, in turn, rigidly affixed to the frame (not shown).
- Hinged support bar 54 extends generally parallel to the path of motion of table 12 and is urged in the counterclockwise direction in FIG. 2 about shoulder bolt 56 to bring the perimeters of back-up rollers 46 and 48 into contact with the perimeter of drive head 44 whereby drive head 44 is urged into firm frictional contact with friction drive bar 36.
- back-up rollers 46 and 48 contact drive head 44 at first and second points which are symmetrically arranged with respect to a point of contact of drive head 44 with friction drive bar 36 to thus trap drive head 44 between them. That is, any tendency of drive head 44 to move in the direction of arrow 14 is carried through back-up rollers 46 and 48, support bar 32 and shoulder bolt 56 to the frame (not shown) to thus resist deflection of shaft 42.
- a second hinged support bar 58 extends generally parallel to the path of motion of table 12 and is pivoted on a shoulder bolt 60 rigidly affixed to the frame (not shown).
- Hinged support bar 58 supports a shaft 62 upon which a pressure roller 64 is rotatably mounted. Pressure roller 64 is urged to bear against friction drive bar 36 (FIG. 2) directly opposed to drive head 44.
- a tension member such as a tension bar 66 is attached to the outboard end of hinged support bar 58 using any suitable means, such as, for example, a pin 68.
- Tension bar 66 passes through the outboard end of hinged support bar 54.
- At least the outer end 70 of tension bar 66 is threaded to receive a nut 72.
- a compression spring 74 is biased between the surface of hinged support bar 54 and nut 72 to urge support bar 54 counterclockwise about shoulder bolt 56 and to urge support bar 58 clockwise about shoulder bolt 60.
- compression spring 74 and tension bar 66 cause friction drive bar 36 to be pinched between pressure roller 64 and drive head 44 to provide close frictional coupling between drive head 44 and friction drive bar 36.
- Tension bar 66, compression spring 74 and nut 72 may be replaced by a tension spring (not shown) biased between hinged support bars 54 and 58 without departing from the scope of the present invention.
- flexure members 38 and 40 are preferably thin strips of semi-rigid plastic or of metal such as, for example, beryllium bronze or steel and are most preferably of blue spring steel having a thickness of from about 5 to about 25 thousandths of an inch.
- flexure members 38 and 40 instead of being thin strips of metal bridging the gap along the entire lengths of both sides of support bar 32 and friction draft bar 36, may instead be a plurality of flexure members (not shown) spaced apart along the length of both sides of support bar 32 and friction drive bar 36.
- flexure member 38 may be omitted. Although this may not constrain remaining flexure member 40 to purely S-shaped deflections, significant errors may not be introduced thereby.
- more than two flexure members may be employed.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Measuring And Other Instruments (AREA)
- Machine Tool Units (AREA)
Abstract
Description
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/195,238 US4378709A (en) | 1980-10-08 | 1980-10-08 | Friction drive for positioning table |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/195,238 US4378709A (en) | 1980-10-08 | 1980-10-08 | Friction drive for positioning table |
Publications (1)
Publication Number | Publication Date |
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US4378709A true US4378709A (en) | 1983-04-05 |
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US06/195,238 Expired - Lifetime US4378709A (en) | 1980-10-08 | 1980-10-08 | Friction drive for positioning table |
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Cited By (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0140622A1 (en) * | 1983-10-13 | 1985-05-08 | Corning Glass Works | Friction drive for fluid metering system |
US4661968A (en) * | 1983-03-23 | 1987-04-28 | U.S. Philips Corporation | Beam exposure apparatus comprising a diaphragm drive for an object carrier |
US4721202A (en) * | 1985-03-21 | 1988-01-26 | Dowty Boulton Paul Limited | Frictional drive units |
US4724713A (en) * | 1985-11-01 | 1988-02-16 | Federal Products Corp. | Drive system for air bearing machines |
US4878877A (en) * | 1987-11-16 | 1989-11-07 | Buddy L Corporation | Plug-in module for motorized toy vehicle |
US4909093A (en) * | 1987-06-02 | 1990-03-20 | Arcware Doors And Automatics Limited | Closure element translation mechanisms |
US5062712A (en) * | 1989-03-07 | 1991-11-05 | Kabushiki Kaisha Toshiba | Aligning apparatus with a coarse/fine movement controller and an ultrafine movement controller |
US5197343A (en) * | 1991-11-13 | 1993-03-30 | Rochte Jerry E | Friction drive for rotary to linear motion |
US5216932A (en) * | 1990-11-30 | 1993-06-08 | Nippon Thompson Co., Ltd. | X-y drive apparatus |
US5345832A (en) * | 1992-02-07 | 1994-09-13 | Nippon Thompson Co., Ltd. | Drive apparatus |
US5357819A (en) * | 1991-12-24 | 1994-10-25 | Nippon Thompson Co., Ltd. | Drive apparatus |
US5598739A (en) * | 1994-01-14 | 1997-02-04 | Miles Inc. | Self-propelled linear motion drive apparatus |
DE4137533C2 (en) * | 1990-11-16 | 2001-03-08 | Nippon Thompson Co Ltd | Positioning table arrangement |
US20030186777A1 (en) * | 2002-03-29 | 2003-10-02 | Tetsuo Ohara | Method and apparatus for a low cost and high force transmission using elastically deformable driving element for friction drive |
US6648509B2 (en) * | 2001-08-15 | 2003-11-18 | Nikon Corporation | Friction-drive stage |
US20090013808A1 (en) * | 2007-07-09 | 2009-01-15 | Vistec Semiconductor Systems Gmbh | Advancing means for a multi-coordinate measurement table of a coordinate measuring device and method for controlling such an advancing means |
US20090310215A1 (en) * | 2007-01-11 | 2009-12-17 | Renishaw Plc | Sample positioning apparatus |
CN103481254A (en) * | 2013-09-27 | 2014-01-01 | 苏州凯欧机械科技有限公司 | Novel workbench driven by friction pull rod |
US9263797B1 (en) | 2011-08-08 | 2016-02-16 | Lockheed Martin Corporation | Pivoting sensor drive system |
USD780238S1 (en) * | 2015-04-03 | 2017-02-28 | Techno Dynamics Inc. | Positioning table |
US9833892B1 (en) * | 2017-02-28 | 2017-12-05 | Juan Gomez | Portable workbench assembly |
USD815166S1 (en) * | 2017-03-10 | 2018-04-10 | Techno Dynamics Inc. | Positioning table |
US10638849B2 (en) | 2016-10-28 | 2020-05-05 | Steelcase Inc. | Convertible body support structure |
US11089868B1 (en) * | 2020-07-26 | 2021-08-17 | Omni Cubed, Inc. | Channel puck for use in a railed table |
CN114688183A (en) * | 2022-03-29 | 2022-07-01 | 苏州矽行半导体技术有限公司 | Brake mechanism and angle modulation carrying platform adopting same |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3155383A (en) * | 1962-10-11 | 1964-11-03 | Link Division Of General Prec | Precision positioning apparatus |
US3232128A (en) * | 1963-09-18 | 1966-02-01 | Bendix Corp | Friction drive for an auto radio signal seeking device |
US3495519A (en) * | 1967-02-01 | 1970-02-17 | Microform Data Systems | Xy table |
DE2229380A1 (en) * | 1972-05-30 | 1973-12-13 | Bbc Brown Boveri & Cie | CROSS TABLE FOR A PROFILE PROJECTOR |
US4226128A (en) * | 1977-04-15 | 1980-10-07 | Autovox S.P.A. | Friction device for use in car radios |
-
1980
- 1980-10-08 US US06/195,238 patent/US4378709A/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3155383A (en) * | 1962-10-11 | 1964-11-03 | Link Division Of General Prec | Precision positioning apparatus |
US3232128A (en) * | 1963-09-18 | 1966-02-01 | Bendix Corp | Friction drive for an auto radio signal seeking device |
US3495519A (en) * | 1967-02-01 | 1970-02-17 | Microform Data Systems | Xy table |
DE2229380A1 (en) * | 1972-05-30 | 1973-12-13 | Bbc Brown Boveri & Cie | CROSS TABLE FOR A PROFILE PROJECTOR |
US4226128A (en) * | 1977-04-15 | 1980-10-07 | Autovox S.P.A. | Friction device for use in car radios |
Cited By (35)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4661968A (en) * | 1983-03-23 | 1987-04-28 | U.S. Philips Corporation | Beam exposure apparatus comprising a diaphragm drive for an object carrier |
EP0140622A1 (en) * | 1983-10-13 | 1985-05-08 | Corning Glass Works | Friction drive for fluid metering system |
US4539854A (en) * | 1983-10-13 | 1985-09-10 | Corning Glass Works | Friction drive for metering device |
US4721202A (en) * | 1985-03-21 | 1988-01-26 | Dowty Boulton Paul Limited | Frictional drive units |
US4724713A (en) * | 1985-11-01 | 1988-02-16 | Federal Products Corp. | Drive system for air bearing machines |
US4909093A (en) * | 1987-06-02 | 1990-03-20 | Arcware Doors And Automatics Limited | Closure element translation mechanisms |
US4878877A (en) * | 1987-11-16 | 1989-11-07 | Buddy L Corporation | Plug-in module for motorized toy vehicle |
US5062712A (en) * | 1989-03-07 | 1991-11-05 | Kabushiki Kaisha Toshiba | Aligning apparatus with a coarse/fine movement controller and an ultrafine movement controller |
DE4137533C2 (en) * | 1990-11-16 | 2001-03-08 | Nippon Thompson Co Ltd | Positioning table arrangement |
US5216932A (en) * | 1990-11-30 | 1993-06-08 | Nippon Thompson Co., Ltd. | X-y drive apparatus |
US5197343A (en) * | 1991-11-13 | 1993-03-30 | Rochte Jerry E | Friction drive for rotary to linear motion |
WO1993010374A1 (en) * | 1991-11-13 | 1993-05-27 | Rochte Jerry E | Friction drive for rotary to linear motion |
US5357819A (en) * | 1991-12-24 | 1994-10-25 | Nippon Thompson Co., Ltd. | Drive apparatus |
US5345832A (en) * | 1992-02-07 | 1994-09-13 | Nippon Thompson Co., Ltd. | Drive apparatus |
US5598739A (en) * | 1994-01-14 | 1997-02-04 | Miles Inc. | Self-propelled linear motion drive apparatus |
US6648509B2 (en) * | 2001-08-15 | 2003-11-18 | Nikon Corporation | Friction-drive stage |
US20030186777A1 (en) * | 2002-03-29 | 2003-10-02 | Tetsuo Ohara | Method and apparatus for a low cost and high force transmission using elastically deformable driving element for friction drive |
US7458914B2 (en) * | 2002-03-29 | 2008-12-02 | Matsushita Electric Industrial Co., Ltd. | Method and apparatus for a low cost and high force transmission using elastically deformable driving element for friction drive |
US8254022B2 (en) | 2007-01-11 | 2012-08-28 | Renishaw Plc | Sample positioning stage and method of operation |
US20090310215A1 (en) * | 2007-01-11 | 2009-12-17 | Renishaw Plc | Sample positioning apparatus |
US20100073672A1 (en) * | 2007-01-11 | 2010-03-25 | Renishaw Plc | Sample positioning stage and method of operation |
DE102007032088B4 (en) * | 2007-07-09 | 2010-08-05 | Vistec Semiconductor Systems Gmbh | Feed device for a multi-coordinate measuring table of a coordinate measuring device |
US8056434B2 (en) | 2007-07-09 | 2011-11-15 | Vistec Semiconductor Systems, Gmbh | Advancing means for a multi-coordinate measurement table of a coordinate measuring device and method for controlling such an advancing means |
US20090013808A1 (en) * | 2007-07-09 | 2009-01-15 | Vistec Semiconductor Systems Gmbh | Advancing means for a multi-coordinate measurement table of a coordinate measuring device and method for controlling such an advancing means |
DE102007032088A1 (en) * | 2007-07-09 | 2009-01-22 | Vistec Semiconductor Systems Gmbh | Feed device for a multi-coordinate measuring table and method for controlling such a feed device |
US9882276B1 (en) | 2011-08-08 | 2018-01-30 | Lockheed Martin Corporation | Pivoting sensor drive system and method |
US9263797B1 (en) | 2011-08-08 | 2016-02-16 | Lockheed Martin Corporation | Pivoting sensor drive system |
CN103481254A (en) * | 2013-09-27 | 2014-01-01 | 苏州凯欧机械科技有限公司 | Novel workbench driven by friction pull rod |
USD780238S1 (en) * | 2015-04-03 | 2017-02-28 | Techno Dynamics Inc. | Positioning table |
US10638849B2 (en) | 2016-10-28 | 2020-05-05 | Steelcase Inc. | Convertible body support structure |
US9833892B1 (en) * | 2017-02-28 | 2017-12-05 | Juan Gomez | Portable workbench assembly |
USD815166S1 (en) * | 2017-03-10 | 2018-04-10 | Techno Dynamics Inc. | Positioning table |
US11089868B1 (en) * | 2020-07-26 | 2021-08-17 | Omni Cubed, Inc. | Channel puck for use in a railed table |
CN114688183A (en) * | 2022-03-29 | 2022-07-01 | 苏州矽行半导体技术有限公司 | Brake mechanism and angle modulation carrying platform adopting same |
CN114688183B (en) * | 2022-03-29 | 2022-11-18 | 苏州矽行半导体技术有限公司 | Brake mechanism and angle modulation carrying platform adopting same |
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STCF | Information on status: patent grant |
Free format text: PATENTED CASE |
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Owner name: CHEMICAL BANK, NEW YORK Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:ANORAD CORPORATION;REEL/FRAME:006331/0092 Effective date: 19921110 |
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